3911.90.70.00 - Chlorinated synthetic rubber

This HTS classification, 3911.90.70.00, specifically covers chlorinated synthetic rubber when presented in its primary forms. Chlorinated synthetic rubber is a derivative of synthetic rubber that has undergone a chlorination process, altering its chemical structure and physical properties. This modification often imparts improved properties such as increased resistance to oil, chemicals, and flame, making it suitable for specialized industrial applications.

The distinction of this subcategory lies in its precise material composition and processing. While the parent category 3911 broadly encompasses various "other" products of synthetic resins not elsewhere specified, this specific subheading isolates chlorinated synthetic rubber. It is important to differentiate this from other synthetic rubbers or other modified polymers that may have different chemical structures or applications.

As this is a leaf node in the HTS classification, there are no further subcategories. Therefore, the classification ends with the explicit identification of chlorinated synthetic rubber. Classification within this code relies on the confirmed presence of chlorination in the synthetic rubber structure and its presentation in a primary form, such as pellets, granules, powders, or liquids, as defined by Chapter 39 notes.